JavaScript 金额类 utils

// 千分符格式化(不自动补位)
function formatter(val, tail = 2) {
  const reg = /\B(?=(\d{3})+(?!\d))/g;
  const num = String(val);
  if (/\.{1}/g.test(num)) {
    const arr = num.split('.');
    return `${arr[0].replace(reg, ',')}.${arr[1].substring(0, tail)}`;
  }
  return num.replace(reg, ',');
}

// 千分符格式化(自动补位)
function formatTail(val, tail = 2) {
  const reg = /\B(?=(\d{3})+(?!\d))/g;
  const num = String(val);
  const suffix = Array(tail).fill(0).join('');
  if (/\.{1}/g.test(num)) {
    const arr = num.split('.');
    return `${arr[0].replace(reg, ',')}.${`${arr[1]}${suffix}`.substring(0, tail)}`;
  }
  const dot = suffix ? '.' : '';
  return `${num.replace(reg, ',')}${dot}${suffix}`;
}

// 去除,
function parser(val, tail = 2) {
  const index = val.lastIndexOf('.') + 1;
  const reg = /\$\s?|(,*)/g;
  if (index !== 0) {
    return val.substring(0, (index + tail)).replace(reg, '');
  }
  return val.replace(reg, '');
}

// 金额数字大写函数
function digitUppercase(price) {
  const fraction = ['角', '分'];
  const digit = ['零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖'];
  const unit = [
    ['元', '万', '亿'],
    ['', '拾', '佰', '仟'],
  ];
  let num = Math.abs(price);
  let s = '';
  fraction.forEach((item, index) => {
    s += (digit[Math.floor(num * 10 * (10 ** index)) % 10] + item).replace(/零./, '');
  });
  s = s || '整';
  num = Math.floor(num);
  for (let i = 0; i < unit[0].length && num > 0; i += 1) {
    let p = '';
    for (let j = 0; j < unit[1].length && num > 0; j += 1) {
      p = digit[num % 10] + unit[1][j] + p;
      num = Math.floor(num / 10);
    }
    s = p.replace(/(零.)*零$/, '').replace(/^$/, '零') + unit[0][i] + s;
  }

  return s.replace(/(零.)*零元/, '元').replace(/(零.)+/g, '零').replace(/^整$/, '零元整');
}

// 验证电话号码
function telNoFormat(val) {
  const reg = /^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$/;
  const num = String(val);
  return num.replace(reg, '');
}

// 计算精度 乘
const accMul = (arg1, arg2) => {
  let m = 0; const s1 = arg1.toString(); const
    s2 = arg2.toString();
  try {
    m += s1.split('.')[1].length;
  } catch (e) {
    // continue regardless of error
  }
  try {
    m += s2.split('.')[1].length;
  } catch (e) {
    // continue regardless of error
  }
  return (Number(s1.replace('.', '')) * Number(s2.replace('.', ''))) / (10 ** m);
};

// 计算精度 除
const accDiv = (arg1, arg2) => {
  let t1 = 0;
  let t2 = 0;
  let r1 = 0;
  let r2 = 0;
  try {
    t1 = arg1.toString().split('.')[1].length;
  } catch (e) {
    // continue regardless of error
  }
  try {
    t2 = arg2.toString().split('.')[1].length;
  } catch (e) {
    // continue regardless of error
  }
  r1 = Number(arg1.toString().replace('.', ''));
  r2 = Number(arg2.toString().replace('.', ''));
  return (r1 / r2) * (10 ** (t2 - t1));
};

// 数字输入框输入时限制 千分位展示，保留两位小数
 <InputNumber
    min={0}
    formatter={(value) => format(value)}
    onBlur={(e) => setFieldsValue({ 'depositAllowance': format(Number(parser(e.target.value)).toFixed(2)) })}
 />
const format = (value) => {
    // eslint-disable-next-line no-useless-escape
    const reg1 = `${value}`.replace(/^(\-)*(\d+)\.(\d\d).*$/, '$1$2.$3');
    const reg = /^(\d+)\.(\d\d).*$/;
    return reg1.replace(/\B(?=(\d{3})+(?!\d))/g, ',').replace(reg, '$1.$2');
};